Bung sput and method of attaching the same to container walls



July 23, 1929- F. G. wlKsTRoM BUNG SPUT AND METHOD 0F ATTAGHING THE `SAME T0 CONTAINER WALLS original Filed March 31, 1927 Patented July 23, 1929.

UNITED STATES PATENT OFFICE. l

FRANK G. WIKSTROM, OF BROOKLYN, NEW YORK, ASSIGNOR INC., F BROOKLYN, NEW YORK, A CORPORATION OF TO HADWIK MFG. CO., NEW YORK.

BUNG SPUT AND 'METHOD 0F ATTAC-KING THE SAlllIE TO CONTAINER WALLS.

28, 1927. Serial No. 222,409.

Original application filed March 31, 1927, Serial No. 179,733. Divided and this ap lication filed tember Thisfinvention relates to bung sputs, and is herein shown applied to a metallic barrel head, although it may, of course, be used in any container wall.

The general objects of the invention are to provide an improved bung sput and bung sput construction an d an improved method by which the bung sput may be securely attached to the wall ofthe barrel head.

This application is al division of my eopending application Serial No. 179,733, filed March 31, 1927.

T he invention will be understood from the following description taken in connection with the accompanying drawing in which Figure 1 is a sectional view through a bung sput construction embodying my invention; Figure 2 is a central sectional view showing a pair of die members adapted to be used in initially securing the bung sput to the barrel head and showing also the bung sput and barrel head in position to be operated upon by said die members; Figure 3 is a central sectional view showingl another pair of die members adapted to be used iii carrying out the final operation in securing the bung sput to the barrel head and also showing the bung sput and barrel head in position to be operated upon by said die members.

:i0 Referring to the drawing, the numeral 11 indicates a` barrel head provided with an opening 12 surrounded by a depending anchor flange 15 with which the bung sput 16 cooperates, so as to prevent relative movement therebetween or leakageV in the manner hereinafter described. The bung sput is so designed as to enable vit to be stamped and otherwise formed in suitable dies and is also designed so as to enable it to be securely attached to the barrel head 11, before the latter is embodiedv in the barrel, by means of dies shown in Figures 2 and 3 and hereinafter described.

As shown in the drawing, the bung sput 16 includes a bung-receiving portion in the form of an internally screw-threaded tubular member 17 formed integral with a relatively flat gasket seat 18 carrying a downwardly and outwardly projecting skirt 19 which terminates in a horizontally disposed base portion 20, the outer margin of which is turned back upon itself, thus forming an upwardly and inwardly projecting lock flange 21. having a width substantially equal to the width of the base portion an iaving its end, as shown in Figure 2, spaced a sufficient distance from 'the outer inclined face of the skirt 19 to permit the anchor flange 15 of the barrel head to enter the space afforded between the skirt 19 and the lock flange 21 preparatory to sceuriug the bung sput 16 to the bariel head 1l.

ln attaching the bung sput 16 to the barrel head 1l, the bung spilt is placed upon a suitable die member 23, having an upwardly projecting annular supporting rib 24, so shaped as to conform to the4 space afforded between the tubular mcmber 17 and the skirt 19 and to support the bung sput in' the position shown 1n B igure 2. With the bung sput 16 thus supported, thc barrel head 11, to which the buner sput is adapted to be connected, and which hasnot yet been attached to the barrel. is so positioned beneath a suitable die member 25 that the anchor flange 15 carried by the barrel head 11 is located in alignment with the opening or space afforded between the skirt 19 and the upper end of the lock flange 2l. llcfoie placing the barrel head 11 in the position shown in Figure 2, the outer surface of the anchor flange l5, may, if desired, be coated 'with a suitable seal-ing compound. not shown in order to further insure an air'and liquidj tight seal between the bung sput 16 and the barrel head 1l after these parts have been attached to one another. After positionin(1r the barrel head 11 beneath the die membei 25, as shown in Figure 2, the die member 25 is moved downwardly, thereby forcing the lower end of the anchor flange 15 into slidin r contact withthe outer inclined face of th skirt 19, which in turn deflects the anchor flange 15 outwardly, as the die member 25 continues to move downwardly, so that the lower end of the anchor flange 15 is ultimately forced into intimate abutting engagementwith the bung spilt 16 at the fold of the base portion 2O and lock flange 21 of the buno' sput. In order to insure such intimate coilhi tact, the anchor flange 15 is so dimensioned that it projects dowi'iwardly` as shown in Figure 2, for a distance somewhat greater than the width of the inner wall of the lock flange 2l plus the thickness ot' the metal of the lock flange at its free end. Inasmuch as the lower end ofthe anchor flange 15 moves into engagement with the bung sput 16 at thefold joining the lock flange 21 and the base portion 20, before the die member 25 completes its downward movement, the* metal which surrounds the opening 12 in the barrel head 11 and is backed up by a depending abutment 27 of the die member 25, is forced outwardly along the outer curved face ofthe abutment 27 and over the adjacent face of the die member 25, as the die member 25 completes its downward movement, thereby causing the barrel head 11 to buckle or become distorted, as shown in Figure 3, such buckling or distortion being permitted by reason of clearance between the adjacent surfaces of the die members 23 and 25 in their final position. Immediately after the lower' end of the anchor flange 15 engages the bung sput 16 at the fold of the base portion 20 and lock flange 21, contact between thev upper end of the lock flange 21 and the barrel head 11 is established, and as the die member 25 continues its downward movement the lock flange 21, backed up by an abutment- 28 formed integral with the die member 23. is moved along the lower face of the barrel head and into close engagement with the fold between the anchor flange 15 and the container wall, such fold being backed u p by the depending abutment 27 ofthe die member 25. As the die member 25 completes its downward movement, the lock flange 21. backed up by the abutment 28 of the lower die member 23, is moved downwardly into horizontal position, and the flange 15 is caused to assume a similar position, whereupon a setting blow is delivered by the die member 25 to the barrel head 11 directly over the flanges 15 and 21, thereby forcing the bar-:e portion 20, anchor flange 15, lock flange 21, and container wall into firm face-to-face contact.

After having thus far assembled the bung sput 16 with respect to the barrel head 11, the head with its attached bung sput is placed upon a die member 29 having an upwardly projecting supporting rib 30 and otherwise the same as the die member 23 above er:- plained, except for the omission of the abutment 28 shown in Figure 2. It is upon the die member 29 that the final operation is carried out in securing the bung sput 16 to the barrel head 1l, as shown in Figure 1, andy in carrying out this final operation a die member 31, shown in Figure 3, is employed. This die member 31 is provided with an annular depending portion 32, which as the die' member 31 moves downwardly, engages the buckled or distorted portion or area ot the barrel head 11 and moves or forms such head over and down into intimate engagement with the bung sput 16 at the fold between the. lock flange 21 and the base portion 20, as shown in Figure 1. It is at this point in the asscmbling that the buckling or distortion of the barrel head 11, as explained in connection with Figure 2, is utilized to a further advantage, such further advantage residing in the fact that the necessity for any substantial drawing or stretching of metal in the barrel head 11 is obviated, since the required amount of metal necessary to the final operation is supplied from the buckled or distorted area with the result that such area'again assumes its normally flat condition. The die member 31 is cut away or relieved as Ashown at 33 in order to accommodate the combined thickness ot' the barrel head 11, base portion 20, lock flange 21 and anchor flange 15, and to at the same time impart a setting blow to the barrel head 11 directly above the horizontally disposed anchor llange 15 and lock flange 21 at or about the time the die member 31 completes its downward movement, thus establishing an air and li uid tight connection between the barrel hea 11 and the bung sput 16.

Vhile many forms oi caps or closures may be used with the bung sput construction hereinbefore described, said construction is particularly adapted for use in connection with the forms of caps described and claimed in mv copending parent application hereinbefore mentione What I claim is:

1. A sheet metal bung sput adapted to be attached to the container wall, characterized prior to its attachment by 'a tubular bungrece1v1ng portion, a gasket seat projecting outwardly from the upper end of said tubular portion, a skirt projecting outwardly and downwardly from said gasket seat, a base port1on projecting outwardly from the bottom of said skirt, and a lock flange inclined upwardly and inwardly from said base por- 100 tion at a substantial angle from the vertical and towards said skirt and terminating a short distance from said skirt.

2. A sheet metal bung sput adapted to be attached to a container wall, characterized 105 prior to its attachment by a tubular bungreceiving portion, a gasket seat projecting outwardly from the upper end of said tubular portion, a skirt projecting outwardly and downwardly from said gasket seat, a base im port-ion projecting outwardly from the bot` tom of said skirt, and a lock flange inclined upwardly and inwardly from said base portion at a substantial angle to the vertical and towards said skirt and terminating a short 11.3 distance from said skirt, said lock flange having a length substantially equal to the length of said base portion.

3. In a metallic receptacle, a wall having an opening therein surrounded by an anchor 12e flange, and a sheet metal bung sput ot the kind described in claim 1 having a tubular bung-receiving portion, a gasket seat projecting outwardly from the upper end of said tubular portion, a skirt projecting out- 1525 wardly and downwardly from said gasket seat, a base portion projecting outwardly from the bottom ot' said skirt, a lock flange extending upwardly and inwardly from said base portion and into the space between 130 said anchor' flange and the container wall, the edge of said anchor flange being in close engagement with the inside of the fold between the lock flange and base portion of the sput, the edge ofl the lock flange being in close engagement with the inside of the fold between said anchor flange and the container wall, and the outside of the fold between said anchor flange and the container wall being in close engagement with the bottom portion of said skirt.

4. In a. metallic receptacle, a wall having an opening therein surrounded by an anchor flange, and a sheet metal bung sput of the kind described in claim l having a tubular bung-receiving portion, a gasket seat projecting outwardly from the upper end of said tubular portion, a skirt projecting outwardly and downwardly from said gasket seat, a base portion projecting outwardly from the bottom of said skirt, a lock flange extending upwardly and inwardly from said base portion and into the space between said anchor flange and the container wall, the edge of said anchor flange being in close engagement with the inside of the fold between the lock flange and base portion of the sput, the edge of the lock flange being in close engagement with the inside of the fold between said anchor flange and the container wall, the outside of the fold between said anchor flange and the container wall being in close engagement with the bottom portion of said skirt, and the container wall being folded down into engagement with the outside of the fold between the base portion and the lock flange of the sput.

5. The method of attaching to a container wall, a sheet metal bung sput having a tubular bung receiving portion, a gasket seat projecting outwardly from the upper end of said tubular portion, a 'skirt projecting outwardly and downwardly from said gasket seat, a hase portion projecting outwardly frorrthe bottom of said skirt, and a lock Hang i inclined upwardly and inwardly i nn said base portion at a substantial angie from the vertical and toward said skirt and terminating a short distance from said skirt; which method consists in forming in the container wall an opening surrounded by an anchor flange having a width somewhat greater than the width of the inner wall of the lock flange of the sput plus the thickness of said lock flange; supporting said sput on a die which engages the under side of its gasket seat, skirt, base portion and fold between the base portion and lock flange; introducing the anchor flange of the container wall into the space between the lock flange and the skirt of the sput; and forcing the container wall downwardly and the anchor flange downwardly and outwardly along the surface of the skirt and base portion of the sput by a die engaging the top of the container wall and the fold between said wall and its anchor flange until the base portion and anchor flange and the lock flange and container wall are in faire to face contact and until the edge of the anchor flange is in close engagement with the inside of' the fold between the lock flange and the base portion of the sput and until the edge of the lock flange is in close engagement with the inside of the fold between the anchor flange and the container wall and until the outside of the fold between the anchor flange and container wall is in close engagement with the bottom portion of the skirt of the sput.

6. The method of attaching to a container wall a sheet metal bung sput having a tubular bung receiving portion, a gasket seat projecting outwardly from the upper end of said tubular portion, a skirt projecting outwardly and downwardly from said gasket seat, a base portion projecting outwardly from the bottom of said skirt, and a lock flange inclined upwardly and inwardly from said base portion at a substantial angle from the vertical and toward said skirt and terminating a short distance from said skirt, which method consists in forming in the container wall an opening surrounded by an anchor flange having a width somewhat greater than the width of the inner wall of' the lock flange of the sput plus the thickness of said lock flange; supporting said sput on a die which engages the under side of its gasket seat, skirt, base portion and fold between the base portion and lock flange; introducing the anchor flange of the container wall into the space between the lock flange and the skirt of the sput; and forcing the container wall downwardly and the anchor flange downwardly and outwardly along the surface of the skirt and base portion of the sput by a die engaging the top of the container wall and the fold between said wall and its anchor flange until the base portion and anchor flange and the lock flange and container wall are in face to face Contact and until the edge of the anchor flange is in close engagement with the inside of the fold between the lock flange and the base portion of the sput and until the edge of the lock flange is in close engagement with the inside of the fold between the anchor flange and the container wall and until the outside of the fold between the anchor flange and container wall is in close engagement with the bottom portion of the skirt of the sput and until the co`n tainer wall is folded down into engagement with the outside of the fold between the base portion and t-he lock flange.

In testimony whereof, I have affixed my signature to this specification.

FRANK G. VIKSTROM. 

